Patbick j



P. J. KELLY.

AUTOMATIC BOILER CONTROL.

APPLICATION mibmov. 26. I917.

1,315,776. PatentedSept. 9,1919.

nu cowlum rump" cm. wummrmn, n. c.

UNITED STATES PATENT OFFICE.

PATRICK J. KELLY, OF CHICAGO, ILLINOIS, ASSIGNOR TO KELLY CONTROLLER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

AUTOMATIC BOILER CONTROL.

Specification of Letters Patent.

Patented Sept. 9, 1919.

Application filed November 26, 1917. Serial No. 203,928.

To all whom it may concern:

Be it known that I, PATRICK J. KELLY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Automatic Boiler Controls, of which the following is a specification.

This invention relates in general to the automatic control of boilers insteam heating systems, and is an improvement on that method oi automatic control described in my Patent No. 1,059,302 granted April 15, 1913. In this patent I have provided means operated by flooding of the water when the boiler becomes too hot, con'nnonly termed priming oi the boiler, for cutting oil communication between the boiler and the pipes of the heating system and for simultaneously closing the damper. Thus, flooding oi the mains and radiators and the consequent pounding and hammering is prevented and only dry steam is delivered to the radiators.

Inv the present invention. I have aimed, primarily, to improve this system with the view to more quickly restoring it to normal after flooding of the boiler caused by overheating. This I accomplish by the provision of means actuated by flooding of the Water to automatically deliver cold water to the boiler, thus effectually assisting in quickly restoring the system to normal.

Another object of my invention is to provide means for carrying out this system of operation in a simple and practical manner so as to insure satisfactory and reliable action. at all times.

Referring to the drawing,

Figure 1 is a side elevation of a heating system embodying my improvements;

Fig. 2 is an enlarged. fragmentary View taken substantially on the line 22 of Fig. 1, showing the valve and actuating mechanism controlling the delivery of cold water to the boiler for the purpose oil restoring the system to normal;

Fig. 3 is a vertical sectional view taken on a median line through Fig. 2; and

Fig. 4 is a horizontal sectional view through the water inlet valve.

The steam heating system shown in the drawing simply as illustrating one example of my improvements, comprises a holler and furnace designated generally by reference characters 3 and t respectively, adapted for ordinary house heating and for general heat ing purposes. The boiler receives its water supply through the pipe 5 and steam is delivered through the pipes 6 and 7 into the chamber or trap 8 from whence it passes through the pipe 9 to the various distributing pipes 11 connected with the radiators. The water ordinarily carried over by the steam is trapped in the chamber 8 and flows back through the pipe 12 to the bottom of the boiler, thus keeping the steam dry and preventing too much moisture from getting into the radiators.

When the boiler gets too hot as it sometimes does, the water boils over, flooding the trap 8 and unless instantly checked would pass into the distributing and heating pipes of the system, impairing the efficiency of the system and causing hammering and pounding. I have provided for handling this condition, as described in my patent ll'lG-llt'lOllGCl above, by the provision of a butterfly valve 13 positioned just above the trap 8 and com nected to a float 1 1 disposed in the trap and adapted to be actuated by the water therein for operating the valve. Should the boiler become too hot and boil over, the water accumulating in the trap 8 causes the float lt to rise and close the butterfly valve 13, thereby preventing passage of water to the heating pipes. This rising movement of the float is also employed to close the damper 1560 as to cause the boiler to cool down. For-this purpose the damper door is connected with the rock shaft 16 to which the butterfly valve 13 is secured, through the intermediary of a suitable connection designated generally by reference character 17.

Obviously, when the float rises the shaft 16 will be rocked in a clockwise direction, there by causing the damper 15 to be closed. When the water in the trap 8 has been returned to the boiler through the pipe 12, the float will lower and again open the valve 13 and also bottom of the boiler through the pipe 18 which receives its supply through thepipe 19. A sliding valve 21 controls the Water supply to the pipe 18 and is adapted to be moved lengthwise in the valve casing. 22

through the agency of 'aooniiectionwith the" shaft 16. This connection consists, in this instance, of a lever 23 passing through a slot in the outer end of the valve stem and connected by a link at to an arm 25 secured by means of a set screw 26 to the rock shaft. It will be manifest that when the float 14 is caused to riseas previously explained, the shaft 16Wlllb6 rockedin a clockwise direction, thus moving the valve 22 lengthwise so as to open the water supply passage, permitting cold water to flow from the pipe 19 into the pipe 18 vand thence intofthe bottom of theboil'er. The eflect of this cold water delivered to the boiler is to cool the same, so that in connection with the closing of the damper and of the passage between the boiler and heating pipes, as mentioned above, the system will be quickly and-effectuallyrestored to normal. Withthe addition to my automatic trap and damper control, of'this means for delivering cold water to the boiler, the'operation of controlling the boiler and restoringthe system to normal 'is effected more quickly and satisfactorily than has been heretofore possible.

It is believed that the foregoing conveys a clear understanding of the objectsjprefaced above, and it should be understood that While I have illustrated one working embodiment of my improvements,various changes might be made in the construction and arrangementof parts without depart ing from the spirit and scope of the inven tion as expressed in the appended claims, in which- I claim:

1. In a steam heating system, thecombination with a boiler and the heating pipes of the system, of a trap in the passage be tween the; boiler and heating pipes, and means actuated by the rising of water to a predetermined levelin thetrap for deliver ingcold water to the boiler.

2. In a steam heating system, theoOmbi nation with a boiler and theheatingpipes of the system, of means actuated by priming of the boiler for closing the passage'between the boiler and said heating pipes and fo'r substantially simultaneously delivering cold water to the boiler.

8. In a steam heating system, the combination with a boiler andtheheating pipes of the system, of a trap in the passage betweeirtheboiler and heating pipes, a float in said trap, a valve in said passage adapted to be operated by said float to close the pas-- sage, and means operated by said float for causing cold water to be delivered to the boiler when water rises in said trap.

a. In a steam heating system, the combination with a. boiler and the heating pipes of the system, of means rendered operative by priming of the boiler to restore'the boiler to normal temperature conditions, said means comprising apparatus actuated by rising of the water to a given level" for closing the passage between the boiler and heating pipes and fordelivering cold water to the boiler. I

Ina steam heating system, the combi-' nation with a boiler, the heating pipes of the system. and a furnace for theboiler includ-.

ing-a damper, of a valve in the'passage be-' tween the "boiler and the heating pipes,

trap interposed between the boiler and heating pipes and adapted to receive the overflow from the boiler, a float in the trap connected with the valve for operating the same, a connectien between the float and damper whereby the latter is operated by. the former, and means operated bythefioat for delivering cold water to the boiler, the parts being so arranged that by rising movement of the float the valveand damper'will be moved in a closing direction and cold Water will be delivered to the boiler.

6. The combination of a boiler, a chamber interposed in thesteam supply line therefor, a float in said chamber, a valve adapted to be"acti1ated by said float to close the steam supply. line, a water supply pipe to the boiler, a valve interposed in said pipe, and a connection between said valve and said float whereby said water valve is opened as the steam valve is closed. 7

7. The combination of a boiler, a Water supply pipe therefor, a steam delivery pipe therefrom, valves in said pipes, and means for opening the'water valve and closing the steam valve upon priming of theboiler.

8. The combination of a boiler, a delivery pipe therefrom, a water supply. pipe-thereto, and means actuated by priming of theboiler for admitting cold water to the boiler.

PATRICK J. KELLY.

Copies of this patent may be 'obtainedfor five cents each; byaddressing-the "Commissioner of ratents, Washington, D. G. 

